Abstract: A jet propelled watercraft having an improved extension assembly for dampening pulsations from the impeller of the jet propulsion unit and also an improved exhaust system having a separate idle discharge for permitting lower idle speeds without restriction of the idle exhaust gas flow.

Abstract: The head and face washing apparatus of the invention is designed to prevent scattering of fluid and enhance the washing efficiency. The head and face washing apparatus comprises pumps (103a to 103d) for supplying washing fluid through supply pipes (101a to 101d), plural spouts (105) for ejecting the washing fluid, and supply passages (106a to 106d) for supplying the washing fluid supplied through the supply pipes (101a to 101d) into the specified spout (105). Washing fluid is continuously pumped out from the pump (103a), while washing fluid is pumped out intermittently from the pumps (103b to 103d). As a result, a continuous water stream is ejected from the spout group (105a), and an intermittent water stream is ejected from the spout groups (105b to 105d).

Abstract: A jet propelled watercraft having an improved extension assembly for dampening pulsations from the impeller of the jet propulsion unit and also for mounting the jet propulsion unit. The structure simplifies the overall assembly and permits individual tuning with conventional units.

Abstract: An apparatus for measuring/determining concentrations of light absorbing materials in blood includes a probe 10 and a measurement device main body 30. A plurality of optical signals of different wavelengths are irradiated onto living tissue, and the concentrations of light absorbing materials in blood is determined by means of a photoplethysmogram detected by means of the light that has transmitted through the tissue. Simulating-signal generating means is provided in the measurement device main body and generates an arbitrary simulating-pulse-wave signal corresponding to the photoplethysmogram detected by the probe.

Abstract: A jet propelled watercraft having an improved extension assembly for dampening pulsations from the impeller of the jet propulsion unit and also for mounting the jet propulsion unit. The structure simplifies the overall assembly and permits individual tuning with conventional units.

Abstract: A number of embodiments of induction systems for watercraft that employ, in addition to the plenum chamber of the air inlet device for the induction system, a further plenum chamber of a predetermined volume that communicates with the induction system plenum chamber for providing silencing and/or tuning effects to improve induction efficiency and silencing. In addition there are disclosed compact intake devices that incorporate plenum chambers for this purpose.

Abstract: An engine control system quantifies engine acceleration advances ignition timing in accordance with the quantified engine acceleration. The control system includes a controller that receives signals indicative of engine speed and crankshaft angle and periodically determines whether the engine acceleration falls into one of four quantified ranges of acceleration: a rapid acceleration range, a moderate acceleration range, a gradual acceleration range; and a range of de minimis acceleration (i.e., substantially no acceleration). The controller then adjusts ignition timing according to engine speed and to the particular acceleration range. In doing so, the controller determines a desired ignition timing by referencing ignition timing maps stored in the memory of the control system. Each map corresponds to one of the acceleration ranges.

Abstract: An image converting apparatus for converting an image of an input video signal into an image with a metallic luster and representing the metallic luster with parameters designated corresponding to the input image. The apparatus is based on the concept that a model of reflected light can represented with a model of reflected light of diffusion reflection and mirror-surface reflection and that even though the resultant model of reflected light is three-dimensional data, assuming that the brightness of an input video signal linearly varies, the model can be represented with brightness data. A color correction circuit 5 has a look-up table with which calculations for generating an image with a metallic luster are performed with the brightness data and the designated parameters. A matrix calculating circuit extracts a luminous signal component from the input video signal. A pre-modifying circuit adjusts the amplitude.

Abstract: A lubrication system for an engine having a fuel system including a floatless carburetor is disclosed. The engine has an intake system through which air is supplied to the engine, the carburetor associated with the intake system and arranged to deliver fuel into air passing through an air flow passage therethrough. The carburetor has a main fuel supply line extending between a fuel supply chamber and a discharge to the air flow passage, a first one-way type valve arranged along the main fuel supply line, a diaphragm dividing the fuel supply chamber from an air chamber, the air chamber coupled to an air source whereby movement of the diaphragm causes fuel to be discharged through the main fuel supply line to the air passage. The lubrication system is arranged to deliver lubricant from a supply through a lubricant supply line communicating with the main fuel supply line between the first one-way type valve and the discharge.

Abstract: A vibrational damper reduces torsional vibration within a crankshaft of a marine engine. The vibrational damper is located on an end of the crankshaft opposite of the flywheel and includes an inertia ring that adds additional mass to this opposite end. In addition, the vibrational damper includes an elastic member that suspends the inertia ring about the crankshaft. The elastic member effectively dampens torsional vibrations. The torsional damper desirably is cooled by an air flow so as to maintain it's dampening efficiency. A ventilation duct, which is positioned directly above the vibrational damper, supplies the cooling air. Cooling is enhanced by locating a bilge system inlet below and slightly behind the vibrational damper. An air flow stream occurs between the duct and the bilge inlet and across the torsional damper to cool the torsional damper.

Abstract: An engine speed restriction system for an internal combustion engine having at least two combustion chambers, an ignition system including an ignition element corresponding to said combustion chamber, and an engine speed sensor is disclosed.

Abstract: A jet drive unit is mounted within a jet propelled watercraft in a fashion which prevents vibrations due to the operation of the craft's impeller system from transmitting to the hull. The power transmitting shaft system connecting the water jet unit impeller with the craft's engine is made through an elastic, vibration dampening coupling. Further, the water jet unit casing is mounted to the hull through a plurality of vibration insulating connector assemblies. Thus undesirable hull vibration, and its accompanying noise, may be eliminated.

Abstract: An elevator overspeed protection apparatus includes a brake apparatus which makes use of eddy currents. The brake apparatus includes a magnetic spring placed on a car in the proximity of a pickup of the elevator overspeed protection apparatus such that, when an arm of the brake apparatus is in a horizontal condition, a displacement of the pickup is prevented with a strong attracting force by the magnetic spring, but when the arm is inclined obliquely, the attracting force of the magnetic spring is prevented from acting upon the pickup. Due to the construction, the brake apparatus operates stably and with certainty and has an increased life.

Abstract: An exhaust silencing system for a small planing craft includes a first expansion chamber housing on one side of a water craft which transmits exhaust gases and waste cooling water to a second expansion chamber housing which may have a number of expansion chambers. A long exhaust pipe extends from the second expansion chamber housing to the atmosphere.

Abstract: A three-dimensional primitive rendering system is disclosed, which comprises first and second registers for storing first and second incremental values of primitive data, respectively, a first adder and a third register for successively adding one of outputs of the first and second registers, fourth and fifth registers for storing first and second incremental values of an evaluation coefficient, respectively, and a second adder and a sixth register for successively adding one of outputs of the fourth and fifth registers, wherein the selection of the outputs of the first and second registers and that of the fourth and fifth registers are performed in accordance with a sign bit received from the sixth register.

Abstract: A brake shoe for an elevator safety device comprising a supporting body provided on a vertically moving body and having a front surface thereof facing a guide rail for being pressed toward the guide rail in the event of an emergency stop; the front surface having a plurality of bottomed holes provided therein; and a plurality of ceramic braking members disposed in the holes of the supporting body and each having a top portion thereof protruding from the front surface of the supporting body and each having an outer size smaller than a complementary size of each the hole. In the brake shoe, deformation, fusion, etc. on braking surfaces and breakage of the braking surfaces due to shocks during operation can be prevented, thereby achieving an improvement in safety and reliability. Further, an elevator speed can be increased and a device size can be reduced.

Abstract: An image processing apparatus processes image information that includes pixels each of which have X-axis and Y-axis coordinates. The apparatus includes a circuit for processing the image information in an X-axis direction, a circuit for processing the image information in a Y-axis direction and a circuit for adding a predetermined value representing a coordinate in a Z-axis direction to each of the pixels of the image information so that the image information is expressed in three dimensions. In this way information representing a two-dimensional primitive image is transformed into pseudo three-dimensional image information that can be combined with three-dimensional images.

Abstract: A rendering system for processing rendering command packets includes a plurality of prefetch circuits which are supplied with a rendering command packet including a rendering command and a parameter and prefetch a next rendering command packet during processing of the former rendering command packet, and a plurality of primitive creating circuits coupled in parallel, each of the primitive creating circuits being coupled to associated one of the prefetch circuits to start processing the next rendering command packet when completing the processing of the former rendering command packet.

Abstract: A line image generating apparatus includes a first register for storing information on a pattern of a segment, a second register for holding first data which is expressed by a fixed decimal point and determined by the ratio between a moving amount on a first axis and a moving amount on a second axis which intersects the first axis, the ratio being variable in each step, a third register for holding second data expressed by a fixed decimal point in a current step, an adder for adding the first and second data and for supplying an output as a result of the addition to the third register, and a selector for selecting an output from the first register as a function of the content of the third register replaced by the output from the adder.

Abstract: A improved pulse oximeter comprises first and second light-emitting diodes that apply red light and infrared light, respectively, to a living tissue including the arterial blood, a photodiode for detecting optical outputs as produced after the red and infrared light of two wavelengths issuing from light-emitting diodes have been absorbed by the living tissue, a first computing unit that computes the ratio between the pulsating components of light absorbance .PHI. for the two wavelengths due to the arterial blood on the basis of the dc components and pulsating components of the respective wavelengths that are obtained from the reception outputs of the photodiode, a correction circuit that not only detects the degree of fluctuation in the absorbance ratio .PHI. as produced from the first computing unit but which also holds the pulsating components of the respective wavelengths when they are stable and which, if there is a fluctuation in the absorbance ratio .PHI., computes a corrected absorbance ratio .PHI.